1978 MACK MC SERIES Recalls (2)

Campaign:: 81V083000 on 07/13/1981
Component:: Structure:body
Manufactured:: 02/28/1978 - 04/30/1981
Affected:: 180
Defect:: The right hand front canopy cab mounting bracket interferes with the right hand brake chamber on the steering axle when in a certain degree turn and severe bumping is present.
Correction:: The front canopy cab mounting bracket will be modified to allow for clearance of the right hand front brake chamber, without charge to owner.
Notes:: Vehicle description: trucks.system: structure; front canopy cab mounting bracket.consequences of defect: if this interference should occur it may result indegraded braking ability without prior warning with the potential for a vehicleaccident.
Campaign:: 84V036000 on 04/10/1984
Component:: Suspension:rear:springs:leaf spring assembly
Manufactured:: 09/30/1978 - 04/30/1982
Affected:: 3,421
Defect:: Spring seat can deform, which causes a decrease in the clamping force in the suspension assembly. loss of clamping force may bring about axle misalignment or axle housing failure.
Correction:: The axle housing will be inspected and replaced, if necessary. the spring seats will also be replaced.
Notes:: Vehicle description: heavy trucks.system: suspension; rear spring seat.consequences of defect: loss of vehicle control could occur without warning,possibly resulting in an accident.